core

#### Nominals Mode Tab

BASICSCAN dialog box - Nominals Mode tab

The options in the Type list on the Nominals Mode tab in the BASICSCAN dialog box (Insert | Scan | Circle, Cylinder, Axis, Center, or Line) are:

- MASTER - Corresponds to Master mode, which is described in the "Nominals Mode" section.

- FINDNOMS - Corresponds to FindNoms mode, which is described in the "Nominals Mode" section. You can enter a FindNoms tolerance that can be applied when finding nominals for a basic scan. For more information, see Nominals list in "Nominals Method Area".

Find noms ONLY on selected surfaces - This check box causes PC-DMIS to look for nominal values for a scan's measured points on only the selected set of surfaces.

For the circle, cylinder, and axis basic scans, there is no need to have CAD data to find the nominals. To execute the basic scan, PC-DMIS obtains the nominals from the nominal data that you supply.

For example, if you entered nominal data such as center and diameter, to execute the circle, that data is used to find the nominals for the circle scan.

Use BestFit - This check box causes PC-DMIS to use best fit algorithms on the data found from the original FINDNOMS operation and then repeat the FINDNOMS operation. This finds the nominal data with greater accuracy when the actual part has a lot of error with respect to the CAD data.

For more information about the BASICSCAN dialog box, see "Common Functions of the BASICSCAN Dialog Box".